气相爆轰基元反应模型数值模拟
Numerical simulation of gaseous detonation with detailed chemical reaction model
查看参考文献20篇
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文摘
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采用基元反应模型和高精度的ENO格式对气相爆轰进行数值研究，对H2／O2／Ar混合气体起爆和爆轰波传播过程的数值模拟结果表明，计算的爆轰波阵面参数和实验相当符合。数值研究的结果还表明，爆轰波反应区中参与反应的不同组分具有不同类型的变化特征。计算结果的精度随着网格尺寸增加而增加，并能保持较好的收敛性。 |
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其他语种文摘
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The gaseous detonation process of H-2/0-2/Ar mixture was numerically simulated with detailed chemical reaction model, which included 9 species and 19 elementary reactions. The one-dimensional governing equations were solved with a high order ENO scheme. Flows and reactions were coupled by a time-splitting method, in which the computations of reaction process were carried out with the chemical kinetics solver CHEMEQ. The temperature of flows was also iterated after each time-step of reaction calculation and each time-step of flow calculation. Gaseous detonation was de-veloped after the ignition in a high pressure and high temperature gas pocket at the rigid end of a tube. The initiation process showed a overdriven period before the wave reached a constant propaga-tion velocity. The calculated parameters of detonation wave, such as detonation wave velocity, C-J pressure and Von Neumann spike pressure, were compared with Gordon-McBride code and experi-mental data, the agreement between them appears to be good, in general. However the calculated reaction zone length is much larger than the steady-state results. The properties of each species in reaction zone were also analyzed, which showed that all the species could be classified into three groups by their magnitude of concentration, which seemed useful to explosion safety designs. |
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来源
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空气动力学学报
,2003,21(1):59-66 【核心库】
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关键词
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爆轰
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数值模拟
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基元反应
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起爆过程
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地址
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中国科学院力学所, 高温气体动力学开放实验室, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0258-1825 |
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学科
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航空 |
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基金
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国家自然科学基金
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中国工程物理研究院联合资助项目
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文献收藏号
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CSCD:1291988
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